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2G big issue turn off car pull key out still runs wont shut off

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Did you just buy the car? Yes or no? Is this a new problem it wasn't doing previously? Does it eventually shut off?
Hard to help you if you can't answer the questions.

Pull the ecu fuse and car will shut off. Fill us in on the rest.
 
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Bought the car as a project car first time cranking it over

Actually sorry it’s the second time yesterday cranked it over it shut off fine today it was stuck on

Pull the ecu fuse and car will shut off. Fill us in on the rest.
And sorry I’m a newbie this is my first project car the fact I got it running is already impressive to me hahaha. and mind you mine is a 98 eclipse gst. so its not a 420A not sure if that makes a difference.
 
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its easier to check if you just remove the switch.

just remove the 2 screws holding in place.
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i cant remember if the stuff is powered or not i paniced and undid fuel pump to shut it off. ill have to get back to you on that. and ill check switch tonight

How long will it run with the key out? Does the radio play in this condition? Almost seems like some odd ignition switch gremlin.
and also with key out will non stop run.
 
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i think Mech Addict was asking because if the radio and stuff works with the key out,
its likely the ignition switch. since none of that stuff works without the ignition switch in acc or on posistion.
If none of it works but the engine still runs, its probably the MFI relay, as luv2rallye suggested.

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That’s helpful. Likely rules out the ignition switch as cause. Next focus on that relay. Best method is to swap in “a known good one”. Sometimes easier said than done. Even new parts can be faulty, and lead to misdiagnosis. One lent from a normal running car is best, but not exactly convenient. Try a WTB add in the classified ads on this forum. I’ve not read about this problem often, leading me to suspect these relayed don’t stick on very often.
 
Yes the MFI relay rarely sticks on but it's possible. When it's running with key out, try banging your hand against the right side console panel (behind which the relay is located - post 8) to see if the vibration will make it un-stick and shut off.
 
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